/*
 * Copyright (C) 2008 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing.testers;

import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.testing.AbstractMapTester;
import com.google.common.collect.testing.WrongType;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code containsValue()} operations on a map. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author George van den Driessche
 * @author Chris Povirk
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V>
{
    @CollectionSize.Require(absent = ZERO)
    public void testContains_yes()
    {
        assertTrue("containsValue(present) should return true", getMap().containsValue(v0()));
    }

    public void testContains_no()
    {
        assertFalse("containsValue(notPresent) should return false", getMap().containsValue(v3()));
    }

    @MapFeature.Require(ALLOWS_NULL_VALUE_QUERIES)
    public void testContains_nullNotContainedButAllowed()
    {
        assertFalse("containsValue(null) should return false", getMap().containsValue(null));
    }

    @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES)
    public void testContains_nullNotContainedAndUnsupported()
    {
        expectNullValueMissingWhenNullValuesUnsupported(
                "containsValue(null) should return false or throw");
    }

    @MapFeature.Require(ALLOWS_NULL_VALUES)
    @CollectionSize.Require(absent = ZERO)
    public void testContains_nonNullWhenNullContained()
    {
        initMapWithNullValue();
        assertFalse("containsValue(notPresent) should return false", getMap().containsValue(v3()));
    }

    @MapFeature.Require(ALLOWS_NULL_VALUES)
    @CollectionSize.Require(absent = ZERO)
    public void testContains_nullContained()
    {
        initMapWithNullValue();
        assertTrue("containsValue(null) should return true", getMap().containsValue(null));
    }

    public void testContains_wrongType()
    {
        try
        {
            // noinspection SuspiciousMethodCalls
            assertFalse(
                    "containsValue(wrongType) should return false or throw",
                    getMap().containsValue(WrongType.VALUE));
        }
        catch (ClassCastException tolerated)
        {
        }
    }
}
